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drm/radeon: add si dpm quirk list

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This adds a quirks list to fix stability problems with
certain SI boards.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=76490

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2015-01-12 17:15:12 -05:00
parent ad1a62227f
commit 5615f890bc
1 changed files with 39 additions and 0 deletions
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39
drivers/gpu/drm/radeon/si_dpm.c
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@ -2908,6 +2908,22 @@ static int si_init_smc_spll_table(struct radeon_device *rdev)
return ret;
}
struct si_dpm_quirk {
u32 chip_vendor;
u32 chip_device;
u32 subsys_vendor;
u32 subsys_device;
u32 max_sclk;
u32 max_mclk;
};
/* cards with dpm stability problems */
static struct si_dpm_quirk si_dpm_quirk_list[] = {
/* PITCAIRN - https://bugs.freedesktop.org/show_bug.cgi?id=76490 */
{ PCI_VENDOR_ID_ATI, 0x6810, 0x1462, 0x3036, 0, 120000 },
{ 0, 0, 0, 0 },
};
static void si_apply_state_adjust_rules(struct radeon_device *rdev,
struct radeon_ps *rps)
{
@ -2918,7 +2934,22 @@ static void si_apply_state_adjust_rules(struct radeon_device *rdev,
u32 mclk, sclk;
u16 vddc, vddci;
u32 max_sclk_vddc, max_mclk_vddci, max_mclk_vddc;
u32 max_sclk = 0, max_mclk = 0;
int i;
struct si_dpm_quirk *p = si_dpm_quirk_list;
/* Apply dpm quirks */
while (p && p->chip_device != 0) {
if (rdev->pdev->vendor == p->chip_vendor &&
rdev->pdev->device == p->chip_device &&
rdev->pdev->subsystem_vendor == p->subsys_vendor &&
rdev->pdev->subsystem_device == p->subsys_device) {
max_sclk = p->max_sclk;
max_mclk = p->max_mclk;
break;
}
++p;
}
if ((rdev->pm.dpm.new_active_crtc_count > 1) ||
ni_dpm_vblank_too_short(rdev))
@ -2972,6 +3003,14 @@ static void si_apply_state_adjust_rules(struct radeon_device *rdev,
if (ps->performance_levels[i].mclk > max_mclk_vddc)
ps->performance_levels[i].mclk = max_mclk_vddc;
}
if (max_mclk) {
if (ps->performance_levels[i].mclk > max_mclk)
ps->performance_levels[i].mclk = max_mclk;
}
if (max_sclk) {
if (ps->performance_levels[i].sclk > max_sclk)
ps->performance_levels[i].sclk = max_sclk;
}
}
/* XXX validate the min clocks required for display */